Ordering by number: this is 470W294126, the Chicago Pneumatic washer. It spreads clamp load and protects the face under the fastener routine hardware, but the wrong one changes how the joint holds torque.

The parts breakdown index is where to start if you are working back from a machine or send the model and serial and we will confirm it. Complete tools sit on the Chicago Pneumatic lineup. Denver stock, with same-day shipment on in-stock orders in by 4 PM ET.

• Part number: 470W294126
• Manufacturer: Chicago Pneumatic
• Crowder SKU: CP-470W294126